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Specify the hex code for a custom colour that can be used on tabs eg ffc0cb for a lighter shade of red.<br>
Useful if people object to the bright red as being too distracting.<br>
Note - no leading # and always 6 characters.<br>
See for example <a href="http://www.tayloredmktg.com/rgb/" target="_blank">Various colour codes on an internets</a>
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